Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ed9bdc470a5652…

MALICIOUS

PDF

100.2 KB Created: 2021-07-16 13:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4936cd4f3cfe26e218766838608d2ebc SHA-1: 502a7b2b47c43386fa10c2d7daa45e28e104c655 SHA-256: 35ed9bdc470a56525110be065cad0d736b8c3ce34cf50848555b2e1bdd6feb77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cichanski.com/Upload/file/71468822102.pdf In PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/45095905497.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df710dbccb9---73826728889.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/9bfd2554da28fbf3a95dbc1f3b6b96a1/7156668718.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078523c52b49---sugokisomelumuzo.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/2169667064.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/nh89ohg7657r93s2abuj7dnhs1/34522066224.pdfIn PDF document text
    • https://steammining.com/userfiles/file/wozerazefurabaxugoxi.pdfIn PDF document text
    • https://eslms.com/userfiles/file/92611036541.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/kopuzuferivawimezaraju.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a8d753efb4a1ab00c9807f8a52d074a0/lepexuvozutono.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/simivisawumamanunoniro.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e35d122ca6a---nepokodatesidutazozibivu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61751135a9---43344975319.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e824dec0c3---zofavewomowumowu.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/h8cm78783k72vgg0dgvlru69a3/vuxuvufutupijot.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/wibososazogan.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e06c3d863---wixikizogutepujilopopa.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/52461015965.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/lapamupunusizikeb.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/ginusededupekukuz.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/dusapadumiwo.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/0fk1k78n794sbhgts8skbc6r8v/sufaxidixokezimedasu.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/36407b6578d341bbc8382a7bfbc7e351/bubujome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+any+kid+can+start+a+business+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBE 11092 bytes
SHA-256: d68da4ae6fb0822c21fbe018f4b89eccc20bb237f6a9e21910f8e7338cef64e9
font_02_sfnt_off00015696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15696 17096 bytes
SHA-256: 18f8519a0af32411056c2c1cc50f975e14af6377dfc0270ffab3c811b8dd6128

Open this report in the interactive analyzer, or submit your own file for analysis.